Gear.



M. DUMONT.

GEAR. APPLICATION FILED APR. 25, 1911.

Patented Sept. 5, 1911.

UNITED i Terrill whom it mayconcern:

' of-Au rora; in the county :iof' Kane and-State.

- ed out in the appended claims,

- *LJMY' ti'onih which thegear isp'rovided with a reof-lllinoi s; have inventedcertain new and usefuhImprovements in Gears; and I. .do hereby declare thatqthe following is a full, clear, and exactdescription thereon-referencebeinghad: to the accompanying .drawings', and to 't-he letters of reference marked thereom-whi'ehformtapart of this specificav This invention' relates to an improvement iii gears and consistsaofi the matterszhereina-fterdescribed andmore particularly p o ntw-T'he novel features of my improvement re}; particularly -.applicablea.for use with gears. applied ''to machines, in which the teetlnatone ormore widely spaced points in-the-peripliery of the gear-are subjected to periodic shocksor strainsas, for example,

ini-a: loomwhere the gear keyedto the crank-shaft has thoseteeth which are in-engageniqentwithl the' driving gear at the instant v hen the pick-is operated, subjected to'a sudden shocker-strain. once during each revolution-of thegear. As a result, the gear teeth ,atsuch point; or points are subjected tqrthegreatest wear and are likely to be bro'kenywhile the rest (if the '.gearteeth are subjected to comparatively "little wearw' It will" thus often h'a'p'pen that one or more teethare broken at-um ointor points of" thege'ar' subjected to this eXcessiv-estraim' while therestof the teeth are left j in good condition. A i proved 1 gear embraces a" construcni'ov-ables'ection carrying a part of the teeth. of the gear and when placed in the-machine theageariwiH be: so ar ifiinged that the teeth on the removable section or sections will be subjected to the periodic shock or wear,-and in case of breakage it will occur inthe teeth carried by the removable'section-or sections which may be removed and replaced without removing the gear from the machine.

Manifestlymy improvement will result not only in economy in the manufacture of the gears, but also in a great saving of time re quired to remove the entire gear and replace the same, especially when the removal of .the gear requires the removal ofparts adjacent to the gear in order to get at it. i

7 In the -draw1ngs:-F1gure 1.18 a side ale jpecification ot Iett'ers Pateii vation ofa gear provided with my improv ment. Fig. 2 is. aside elevation ofth'e gear with .the section .carrying the replaceable teeth removed. Fig, .3 view represent 11.1ga vertical section of thezgear in a plane indicatedby the line 3- -3 of Fig. 1, Fig.2;

is a view representing til-transversesection through the gearina. plane indicated by the line of Fig. --1. Fig. 15 isa perspective view, otthe removable gear section.

.My improved gear comprises. a body hav ing a toothed .rim provided with one or more gaps .in its periphery, each vadapted to be, .7 filled'by a toothed rim segment carried by a gear section which is removably secured to the gear. ".As shown herein, the gear rim is provided with aisingle gap and sucha gear is designed; foruse. where the teeth at One part'onlyof the a' gear are subjectedflto the periodic shock hereinbefore referred to. lhe gearuhas a web locatedadjacent the gap and providedwith a shoulder extending between the ends of the gap adapted fdr the support of the removable section. v

Referring now in detail to the drawings,

'A indicates .thegear. Said gear has arim a provided with'a gap on theup'per side of the gear to receive the removable rimf segment; a hub b-andi spokes B, B, B. .As shown in the drawings, thenpper part 10f the gear, that is to say, that part on the side to. beprovided with; the replaceable gear .ratateasepps, -1 1 j teeth, has an integralweb C ivitlran arcuateTouterI edgeicforming' a continuation of the circle. whichdefines the inner. periphery a of the gear-wheel rim 1 a, and providing ashoulderiforv the support of the-removable gear section.v Said wehis made rigid with the two adjacent wheel. spokes .B, B, with thehub and with thejparts a a of the gearwheel rim a which extend beyond the ends of said. spokeson the side ofthe ,gear occ'upied by said web- The... rear face Gi of said web C, as shown herein, is located in or near the plane of the rear face of the. gear,- (and the. lateral .parts 0. 0. 1 of. said web-located adjacent the parts a a of the rim a have their front faces in or near the plane of the front face of said gear. Intermediate said lateral parts 0 channels or grooves C C are formed in the front face of the Web, which channels or grooves are separated by a radial rib D whichdivides the gap in the gear rim (1 into equal parts. The lateral edges 03, cl of the rib D are parallel to the diameter of the gear extending centrally through said rib, and the outer lateral walls git, a 'of: the channels C, C are. parallel to ;the lateral-edges of said rib. The rim a of the geafterminates in radial shoulders a a the. edges of which intersect the lateral walls 11 .030 of the channels C C and which dethe main gear.

line the ends of the gap in said rim.

indicates the removable section of the gear.-" 'Saidsection comprises a segmental isadapted to fill the gap between the shoulrim 0 provided with, gear teeth e} which rim :j ders at, a in which the rim of the main vided with ribs F, F adapted to engage the gear. said ribs being separated by a channeh'i" which is adapted to. receive the jfib. D'of said web. The segmental rim e the-body member projects rearwardlylz beyond the rear face of denor'ofiset which is adapted to ar upon the". arcuate edge or shoulder a of the web w tobear against the radial shoulterminates. The bottom edge F of'the re'-' movable. section is adapted to bear on the tlg upper edges of the spokes B, B,and is pro- ;vided'witha rounded groove f adapted to on the hub b of the gear. When the "removable-section of the gear is in-place, it

is: rigidly held thereby means of boltsG whibh- "extend through apertures g, 9,

form Q, respectively,-'in the body of sa1d JQ Ii QVa' 1e section and in the .web C of the gm. I I "JAB/shown herein, the removable section filmy-be removed fromthe main gear after ithegbolts. G have been removed, either in a direction 'parallel to the, central axis of the gear, that is to say, in adirection at right ,-.-a hgles to the face of the gear, or it may be oved radially in the-plane of the gear.

in e manner inwhich the removable section -w-ill be taken from the gear will de end upon the nature of the machine in w ich with reference toadjacent parts of the machine. a

, thus formin a shouls g The endsae, e of said -r1msgment are radial to the gear and are Y one embodiment of invention'I haveire erred tocertain detai i of mechanlcal construction, it is to be understood that my invention'is not limited thereby except as may be pointed out in the appended claims.

I claim as my mvention--' 1'. A gear com rismg'a-body having a hub,

an annular toothed rim provided with a gap and means connectingsa-id rim and hub including a' web having an arcuate shoulder extending between the ends of said gap,

a toothed rim segment adapted to fill sai gap and a bodya removable section 'havin member adapted for engagement a ainst ing parallel with" the radius. of said gear separatedby equal angles from the ends of said gap, and means for removably securingsaid gear section to said gear. a 2. gear comprising a body having a hub,

an annular toothed rim provided with a ga with radial shoulders at the ends of sad gap, and means connecting said rim a'ndhub including a web having an arcuate shoulder extending between the ends of said gap, a removable section havinga toothed rim segment adapted to fill said gap and a,body' I member. adapted for engagemgit/against said web,-said body member being ofiset to provide an arcuate shoulder adapted'to' rest vided with interlockin' grooves and ribs,

upon the shoulder of said 'web and said body member and 'web' being respectively prothe lateral edges of sa1d grooves and ribs being parallel with; the radius ofsaid gear separated by equal angles from the ends of.

sa1d gap, said body member having an annular transverse groove adapted to receive said hub, and means for removably .securin said body member to saidweb. I i testimony that I,' claim the foregoing as my invention I'aifix my signature in the presence of two witnesses,- this 17th day of April A. D. 1911. the-gear is used, and the position of the gear MA RICE DUMONT, Witnesses;

TIM Braver, 

